<!DOCTYPE html>
<html>
<head>
  <script src="../../processing.js"></script>
<link rel="stylesheet" href="../style.css"/></head>
<body><h1><a href="http://ejohn.org/blog/processingjs/">Processing.js</a></h1>
<h2>ArrayObjects</h2>

<p>Demonstrates the syntax for creating an array of custom objects.</p>

<p><a href="http://processing.org/learning/basics/arrayobjects.html"><b>Original Processing.org Example:</b> ArrayObjects</a><br>
<script type="application/processing">
int unit = 40;
int num;
Module[] mods;

void setup() 
{
  size(200, 200);
  background(176);
  noStroke();
  
  num = width/unit * width/unit;
  mods = new Module[num];
  
  for (int i=0; i<height/unit; i++) {
    for(int j=0; j<height/unit; j++) {
      int index = i*height/unit + j;
      mods[index] = new Module(j*unit, i*unit, unit/2, unit/2, random(0.05, 0.8));  
    }
  }
}

void draw() 
{
  for(int i=0; i<num; i++) {
    mods[i].update();
    mods[i].draw();
  }
}

class Module {
  float mx, my;
  int size = unit;
  float x, y = 0;
  int xdir = 1;
  int ydir = 1;
  float speed; 
  
  // Contructor (required)
  Module(float imx, float imy, float ix, float iy, float ispeed) {
    mx = imy;
    my = imx;
    x = int(ix);
    y = int(iy);
    speed = ispeed;
  }
  
  // Custom method for updating the variables
  void update() {
    x = x + (speed * xdir);
    if (x >= size || x <= 0) {
      xdir *= -1;
      x = x + (1 * xdir);
      y = y + (1 * ydir);
    }
    if (y >= size || y <= 0) {
      ydir *= -1;
      y = y + (1 * ydir);
    }
  }
  
  // Custom method for drawing the object
  void draw() {
    stroke(second()*4);
    point(mx+x-1, my+y-1);
  }
}
</script><canvas width="200" height="200"></canvas></p>
<div style="height:0px;width:0px;overflow:hidden;"></div>

<pre><b>// All Examples Written by <a href="http://reas.com/">Casey Reas</a> and <a href="http://benfry.com/">Ben Fry</a>
// unless otherwise stated.</b>
int unit = 40;
int num;
Module[] mods;

void setup() 
{
  size(200, 200);
  background(176);
  noStroke();
  
  num = width/unit * width/unit;
  mods = new Module[num];
  
  for (int i=0; i&lt;height/unit; i++) {
    for(int j=0; j&lt;height/unit; j++) {
      int index = i*height/unit + j;
      mods[index] = new Module(j*unit, i*unit, unit/2, unit/2, random(0.05, 0.8));  
    }
  }
}

void draw() 
{
  for(int i=0; i&lt;num; i++) {
    mods[i].update();
    mods[i].draw();
  }
}

class Module {
  float mx, my;
  int size = unit;
  float x, y = 0;
  int xdir = 1;
  int ydir = 1;
  float speed; 
  
  // Contructor (required)
  Module(float imx, float imy, float ix, float iy, float ispeed) {
    mx = imy;
    my = imx;
    x = int(ix);
    y = int(iy);
    speed = ispeed;
  }
  
  // Custom method for updating the variables
  void update() {
    x = x + (speed * xdir);
    if (x &gt;= size || x &lt;= 0) {
      xdir *= -1;
      x = x + (1 * xdir);
      y = y + (1 * ydir);
    }
    if (y &gt;= size || y &lt;= 0) {
      ydir *= -1;
      y = y + (1 * ydir);
    }
  }
  
  // Custom method for drawing the object
  void draw() {
    stroke(second()*4);
    point(mx+x-1, my+y-1);
  }
}</pre>
</body>
</html>
